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Finding the Fourth Proportional to 7,419.56, 11,086.75 and 7,281.05

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Solution

The fourth proportional to 7,419.56, 11,086.75 and 7,281.05 is: 10,879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.56 : 11,086.75 = 7,281.05 : x
  2. Step 2: Convert to fraction form
    7,419.56/11,086.75 = 7,281.05/x
  3. Step 3: Cross multiply
    7,419.56x = 11,086.75 × 7,281.05
  4. Step 4: Simplify right side
    7,419.56x = 80,723,134.76
  5. Step 5: Solve for x
    x = 80,723,134.76/7,419.56
  6. Step 6: Final answer
    x = 10,879.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.